Snap-On Dual 3412 - Connecting Service Hoses to Vehicle

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Connecting Service Hoses to Vehicle
Figure 2-3: Service Hose Connections to Vehicle
B  Manifold Gauge Set
C  Yellow Hose
D  Blue Hose
E  Low-Side Blue Hose Coupler
F  High-Side Red Hose Coupler
G  Red Hose
H  Low-Side Blue Hose Fitting
I  High-Side Red Hose Fitting
Follow this procedure to connect the service hoses to the
vehicle.
1. Connect red high-side hose with service fitting adaptor, if
applicable, from manifold gauge set to high-side service
port on vehicle.
2. Connect blue low-side hose with service fitting adaptor, if
applicable, from manifold gauge set to low-side service
port on vehicle.
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If the vehicle has more than one low-side service port,
use the service port closest to the evaporator.
3. Open hose hand valves or service couplers.
— Refer to the vehicle manufacturer’s service manual
for proper diagnostic procedures and specifications.